Oral appliance for improving airway function during sleep or physical activity



FIG. 1 is a rear perspective view of an oral appliance for improving airway function during sleep or physical activity showing my new design.

FIG. 2 is a front perspective view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a right side elevational view thereof.

FIG. 6 is a left side elevational view thereof.

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a rear elevational view thereof. 

The ornamental design for an oral appliance for improving airway function during sleep or physical activity, as shown and described. 